diff --git a/app.properties b/app.properties
index a9573541..1cb3d661 100644
--- a/app.properties
+++ b/app.properties
@@ -110,6 +110,7 @@ java.application.options: -Dunixfs=false \
                           --add-opens=java.logging/java.util.logging=ALL-UNNAMED \
                           --add-opens=java.desktop/java.awt=ALL-UNNAMED \
                           --add-opens=java.desktop/sun.awt=ALL-UNNAMED \
+                          --add-opens=java.desktop/sun.swing=ALL-UNNAMED \
                           --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED \
                           --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED